The Fifth Watcher - Worlds Apart, #1

At the moment of Audrey Montgomery's birth a new world came into existence. It is a barren place, a catalyst for the darkness spreading through the multidimensional system. The shift in power makes Audrey an invaluable pawn in a war between those who want to protect her and those who will go to extraordinary lengths to eliminate her. As a result, she has spent her life on the run, unaware of her true origins.
When her father dies and leaves her with a shocking legacy, her life is irrevocably changed. If she has any hope of surviving, Audrey must embrace her new reality and trust a man who is as dark and uncertain as the future itself. Lieutenant Keith Delany, an Interdimensional Officer of the Law (IDOL), is tasked with bringing her in. It is an assignment his entire team is invested in, having spent years searching for her.
As a senior member of the squad, Keith is charged with protecting her, with showing her the truth about her past, and with preparing her for an unknown future. As an IDOL he is responsible for every life, for every traveller who navigates the system. But his connection to Audrey is unprecedented, and he soon discovers she alone holds the power to prevent the continuum's collapse.